Get Rihanna's Rock-Hard Abs with this Workout

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Get Rihanna's Rock-Hard Abs with this Workout

You’ll Need: An exercise mat, some hot Rihanna tunes, and major girl power!

Full-Range Sit-UpStart with your back on the floor with your heels secure, shoulder width apart. Leading with your chest up towards the ceiling, use the spine as it is in neutral position. Drive all the way up with your chest and once you reach your knees, extend your arms up and straight overhead. Your shoulders should be directly over your hips.

Complete 32 reps.

Sit-Ups with Torso Rotations: Lie on your back with your right ankle resting on your left knee. Your right arm is placed on the floor out to the side. Keeping the right shoulder down, curl the left shoulder up to the right knee. Repeat with opposite limbs.

Complete 32 reps on each side.

Holding Plank:Begin in the plank position with your forearms and toes on the floor. Keep your torso straight and rigid and your body in a straight line from ears to toes with no sagging or bending. Your head is relaxed and you should be looking at the floor.

Hold this position for 32 seconds, repeat 3 times.

Active Plank:From plank position, take your right hand, lift it from the floor and drive it into yourself (forward and back) like you're tapping the floor. Think about the elbow striking something behind you.

Complete 32 reps on each side. Believe us, you will be exhausted.

Roman RotatorStand in a horse straddle, with your feet parallel in a wide squat position with your back flat. Take your arms and lift your elbows to shoulder height. Rotate left to right, right to left.

Do this one till you’re working up a major sweat!

For more great Ary Nuñez workouts, download the Nike Training Club (NTC) App from iTunes (no excuses, it’s free!). “All the exercises are incredible, and you get all the visuals too,” says Nuñez. “The more minutes you work out, the more routines you’ll be able to unlock—and I’m already a Black Belt!”

About Kristen Aldridge

Kristen Aldridge lends her pop culture expertise to Yahoo! as host of "omg! NOW." Receiving millions of hits per day, the hugely popular daily entertainment news program is one of the most-watched on the web. As a seasoned entertainment journalist, pop culture expert, fashion addict and lover of all things creative, she is founder of positivelycelebrity.com and recently launched her own celeb-inspired fashion line and smartphone app. Connect with Kristen to talk all things celebrity via Twitter and Facebook, or visit her official website.